the 13 (for now) Planets of the Solar System

[edoy]

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Kulang. There are four more, if we push aside the IAU "officiality report" and instead focusing on the CRITERIA.

They are:

1) Orcus 90482 Orcus - Wikipedia, the free encyclopedia

2) Sedna 90377 Sedna - Wikipedia, the free encyclopedia

3) Quaoar 50000 Quaoar - Wikipedia, the free encyclopedia

4) Varuna 20000 Varuna - Wikipedia, the free encyclopedia

I respect the set criteria (agreed by most astronomers and planetary geologists around the world) rather than the IAU "officiality" statement

Furthermore, if criteria is again followed, then at the moment, we actually have more than 1000 dwarf planets or TNU's in the Kuiper Belt. The reason why the IAU decided to declare the 8 planets plus 5 dwarf planets as "official" is more a "political decision", so that education departments around the world can declare it to be such so that kids in schools won't be obliged to memorize more than 1000 planets (imagine that)!

-RODION

there's a politics in science as well as politics have science.....

[roadioarts]

By the way, there's a asteroid belt in between Mars and Jupiter that some said that It was a planet similar the size of earth. Up to this day, that speculations still on the debate.

Science governs by politics.

[rodsky]

Science governs by politics.

People who make remarks like this totally do not understand how the scientific community and the scientific method works.

-RODION

[paintableguy]

as of now mao pa na, since technology nato dili pa maka attain in seeing the whole universe..

[ayosdito]

informative thanks.

[aljy]

Just makes me think about all the things I learned in elementary.As the saying goes "Change is the only constant thing in this world".

[gareb]

The Dwarf Planets of the Solar System




In 2006 the organization responsible for classifying celestial bodies, the International Astronomical Union, decided that a new class of objects was needed. The solar system's erratic ninth planet, Pluto, was assigned to the new “dwarf planet” category along with four other bodies, all tinier than Earth’s moon. Some astronomers expect there may be as many as 50 dwarf planets in the solar system.

Eris, the largest dwarf planet, is only slightly bigger than Pluto, at 1,445 miles in diameter (2,326 km). Discovered in 2003, Eris orbits at an average distance of 68 AU (that is, 68 times the Earth’s distance from the sun) and takes 561.4 Earth years to circle the sun. Eris has the orbit that is most highly inclined of all the dwarf planets, tilted nearly 47 degrees from the plane of the planets’ orbits. A day on Eris takes 25.9 hours. Eris has one moon, Dysnomia.

Pluto, discovered in 1930, orbits the sun at an average of 39.5 times the Earth’s distance. Its diameter is 1,430 miles (2,302 km). Pluto takes 247.9 Earth years to orbit the sun, and its day is 6.39 times as long as Earth’s. Pluto has five known moons: Charon, Nix, Hydra and two that were recently discovered and have not yet been named.

Haumea was discovered in 2003. This dwarf planet has an extremely elongated shape, with its longest dimension being about 1,218 miles long (1,960 km). Haumea rotates very rapidly and has the shortest day of all the dwarf planets, only 3.9 hours. Orbiting 43.1 times farther from the sun than Earth does, Haumea takes nearly 282 Earth years to complete one orbit. Haumea has two moons, Hi’iaka and Namaka.

Makemake, discovered in 2005, has no known moons. Makemake orbits at 45.3 times Earth’s distance and takes more than 305 years to complete a circuit of the sun. Its day is 22.5 hours. Makemake’s average diameter is 882 miles (1,420 km).

Ceres, first spotted by astronomers in 1801, was first called a planet and later an asteroid. In 2006 it was reclassified as a dwarf planet. Ceres is the closest dwarf planet to Earth, orbiting at only 2.8 times Earth’s distance from the sun. Its year takes 4.6 Earth years and its day is 9.1 hours. Ceres has no known moons.

[edoy]

we'll wait and see of how many planets do we have in the next 50 years or more....

[Sarevok]

Hmmmm karon pa ko na nibalik na diay pagkaplanet ang pluto. I thought demoted na to.

Nalingaw ko sa Makemake planet. If binisay-on nato kay "Himohimo" or "Buhatbuhat" ra na planet

[edoy]

basin naa nay planet luoyo sa moon puhon...